Also, it starts in 2009...
When was Breslan? The Norway summer camp (to me, that was equal with a school, all kids, etc) and even Scotland’s Dunblane and Australia’s Port Arthur.
When were those?
Starting at 2009 leaves them all out.
Norway was AFTER 2009.
Go back quite a few more years. Enoch Brown School massacre. 10 students and teacher killed. Year, 1764 Pennsylvania. Weapons used, One musket and tomahawks.